Replace continue with return in inner test method.

Author: freakboy3742

Lib/test/test_io.py

@@ -532,7 +532,7 @@ def do_test(test, obj, abilities):
             if sys.platform.startswith("win") and test in (
                     pipe_reader, pipe_writer):
                 # Pipes seem to appear as seekable on Windows
-                continue
+                return
             seekable = "s" in abilities
             self.assertEqual(obj.seekable(), seekable)